It would depend upon how many categories one may have for whatever the listing is. Without knowing the choices of categories, how could we assume whether they fall in the same one or not?
If you're talking computer related as one category, then they would all fall in there. If there was a further breakdown, SPAM filters and popup blockers would be in one while virus protection may be in another. However, all of them could be listed in a single category if it was protection and prevention for computers.
